Ok, I've got one. I'm trying to do some testing for a client using a
video chat system based on Flash. Flash simply won't use the camera or
mic on my system although both work just fine in ekiga, cheese, skype,
you name it. In fact, a right click in the Flash pages on the client's
site brings up the Flash control panel, but the "Settings..." option
is greyed out.
Anyone else run into this? Any suggestions on how to fix it?

Complain to Adobe.

Singularly useless response, Pat. I have told Adobe. My curiosity was
whether I had a misconfiguration on Firefox, since a right click brings
up Flash's menus, but "Settings..." is greyed out.
Under Konqueror, "Settings..." is NOT greyed out. However, if you
select it and the settings screen pops up, you can't select anything in
the settings screen, nor can you close it. The only way out is to close
Konqueror.
In Opera, I can't find the Flash menu anywhere (right click brings up
Opera's options window).
So, three different browsers, three different behaviors. Smells like a
config problem to me...that's why I posted my question.

We aren't mind-readers Rick. If you had mentioned any of that before, we
could have saved ourselves the effort of this exchange. When asking a
question it's important to give enough information for a meaningful answer.